Schatten HFN-C Active VT Pickup for Classical Guitar (Includes Preamp with 2 Thumbwhell controls) - DjangoBooks.com
Yamaha NCX1 NT - Nylon Classical Guitar with Preamp | Garrett Park Vintage Guitars
Sound Hunter Soundhole Guitar Pickup with Pickup Piezo Rod Endpin Jack Cable 3pcs Double Sided Tapes Adhesive Fastener Tape for Acoustic Classical Guitar with Guitar Preamp & Control for Beginners - Walmart.com
Classical Guitar with cutaway QGC-20CE w/preamp - Oqan
Recording Classical Guitar: More from Top Engineers John Taylor, Norbert Kraft, and Ricardo Marui | Classical Guitar